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Multiscale wedge guitar-pics and sounds
http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=14212
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Author:  Dave White [ Wed Oct 24, 2007 2:40 am ]
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After making Weissenborns, a Harp-guitar and a guitar-bouzouki this year I thought it was time to do a simple instrument. So here is the last of my Celtic Festival Series – Lughnasa – a 15 fret clear of the body, multi scale, Manzer wedge with adjustable neck and “woofer/tweeter” sound-ports .

From my guitar-bouzouki commission earlier this year I ended up with a lovely bearclaw Euro spuce top that developed a tiny crack in the bottom of the treble lower bout and had to come off and be replaced. It had a great tap tone and I didn’t have the heart to do a “Joshua” with it. I already have my own guitar bouzouki, but in my search for the “ultimate dropped tuning fingerstyle guitar” I wanted to experiment with multi-scales and also wanted to see how the Linda Manzer wedge style would work out. So this instrument was conceived and finally born around the already braced top. Removing the top opened up numerous opportunities for creative inlays (De Faoite bling) and a final twist of fate on final sanding allowed the formation of the “tweeter” sound port in the tops bass-side upper bout just down from the side sound port.

The specs are as follows:

Bearclaw Euro spruce top, EIR back and sides
Flamed koa bindings with bwb side and top purfling.
Mahogany neck with bubinga heel.
Old Rio rosewood headstock veneers, end graft, heel cap and nut
Kingwood bridge with bone split-saddle and koa bridge-pins
Ebony fretboard bound with curly koa.
Gotoh tuners with ebony buttons.
Finish is Pre-cat lacquer (over Z-poxy on b/s) and Tru-oil over Z-Poxy on the neck.
Scale length: 630mm to 657mm (24.8” to 25.9”)

The strings went on on Monday. I thought it appropriate to play and record a Martin Simpson arrangement on this guitar as it was Martin that inspired and opened my eyes and ears to altered tunings. This is his arrangement of the Irish air “The Streets of Derry” that he played in 2001 at a weekend guitar workshop in Little Grove, Bucks, and I transcribed it from his playing. It's in CSus2 tuning – CGCGCD.

The Streets of Derry

The fanned frets are easy to play and you forget all about the odd shape pretty quickly. The guitar has a really lovely reverby quality from the EIR and great volume and sustain. It will be interesting to hear it open up. I need to recut and fit another nut as the string spacings are a little off- this is one of the trickier parts of the fanned frets piece. I got the idea for the Rosewood nut from a guitar made by Matt Mustapick that was posted on another forum. It works well and sounds great. At some stage I’ll make a bone one just to compare the sound. The top “Tweeter” sound port definitely adds something positive to the sound and the guitar sounds and feels much more full and open when I uncover it. It can’t yet describe its effect in more detail and need to do some more playing to do so. Here are some pics - thanks for looking and listening:









"Woofer/Tweeter" sound-port:





And the top bracing:


Author:  Andy Matthews [ Wed Oct 24, 2007 2:49 am ]
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Dave, that's astonishing!
Inspiring work, seriously. And I adore the way it sounds, very Sobell.

a thousand times

Author:  Keith M [ Wed Oct 24, 2007 3:02 am ]
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WOW!! Dave that is really cool AND tasteful AND well executed AND great sounding, all at the same time. Thanks for posting.

Author:  SteveCourtright [ Wed Oct 24, 2007 3:08 am ]
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Truly an amazing instrument. The binding alone makes my head spin, and the bear claw in the top is so lovely and what a nice shape she is! Ditto

Author:  Sam Price [ Wed Oct 24, 2007 3:10 am ]
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Absolutely beautiful.


Author:  Mattia Valente [ Wed Oct 24, 2007 3:24 am ]
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Very nice! Have you perchance got a shot down the fingerboard? I'm still trying to wrap my head around the scarf joint geometry required for this - whether the headstock's angled out of square, basically. My next personal acoustic will be a fanned fret baritone, been on the drawing board for far too long now...

Author:  Sam Price [ Wed Oct 24, 2007 3:25 am ]
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I was so speechless in my last post, that I forgot to ask about the logistics of fanned frets (I'm not even considering this at the moment!!)...I imagine they are a little more difficult to create than regular frets- it's something I have been aware of for years (through Bashkin's work), but haven't got round to examining the process...

REALLY love the special touch with the tweeter binding too...


Author:  Michael Dale Payne [ Wed Oct 24, 2007 3:53 am ]
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That thing has more ports that an ocean-liner

gorgeous by the way

Author:  Michael Dale Payne [ Wed Oct 24, 2007 3:54 am ]
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Oh I guess those ar not ports nevermind

Author:  WaddyThomson [ Wed Oct 24, 2007 3:54 am ]
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Dave, that is just awesome.  The sound is rich and full, with wonderful overtones.  Very nice recording.  Also the blending of the woods and the special touches around the upper bout are just stunning.  What a great guitar.     

Author:  Andy Matthews [ Wed Oct 24, 2007 4:01 am ]
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[QUOTE=Mattia Valente] Very nice! Have you perchance got a shot down the fingerboard? I'm still trying to wrap my head around the scarf joint geometry required for this - whether the headstock's angled out of square, basically. My next personal acoustic will be a fanned fret baritone, been on the drawing board for far too long now...[/QUOTE]

My fanned fretter has an off square headstock, brings the break point for the nut round into the right spot...

Author:  Andy Matthews [ Wed Oct 24, 2007 4:40 am ]
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[QUOTE=verhoevenc] Ya know what would REALLY be awesome... a tutorial on fanned fret necks... or at least the fretboards. Just how you slot them at the angles correctly, etc. And I say neck cause I'd also be curious to see how you do the scarf so that it breaks at the right compound angle.
Chris[/QUOTE]

I slotted mine by hand. Marked out the two scale lengths, and "joined the dots" It took a whole day, but worked out fine.
As for the scarf. My method was to leave the headstock section well over thickness, then remove material from it's face un-evenly to swing the break point round. The headstock was then thicknessed using it's face as a reference - leaving me with the twist

Author:  Mattia Valente [ Wed Oct 24, 2007 4:47 am ]
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Mike Doolin to the rescue, once again:

http://www.doolinguitars.com/articles/novax/

I also dimly recall Sprokett (Paul) posting a tutorial on his approach to slotting a fanned fret board with a tablesaw, maybe a year or two back, right on this-here forum.

Author:  Bruce Dickey [ Wed Oct 24, 2007 4:49 am ]
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Pulled out all the stops I see. Go Dave.


Author:  Billy T [ Wed Oct 24, 2007 5:59 am ]
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Outstanding!!! What's the finish on the neck?

Author:  LanceK [ Wed Oct 24, 2007 6:22 am ]
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Dave, you are one creative dude!

Author:  Dave White [ Wed Oct 24, 2007 6:44 am ]
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Jammy,
Thanks - your 7 string fan-fret was mighty fine too. Did you get any sound clips of that?

Keith & Steve,

Thanks. I like the shape - it's nice and curvy with a full bottom The wedge really helps with the comfort factor and doesn't hurt the sound.

Sam,

Thank you too. Multi scale isn't really that hard - it's all basic first principles and linear geometry. The priciples are:

- decide your shortest and longest scales

- decide which fret you want to be perpendicular to the line down the middle of the fretboard, like "normal" frets are. I chose the 9th.

- decide the fretboard widths (at nut and body join)and taper you want

- draw the fretboard in (extending the lines past the nut)

- draw the first and sixth strings in, inset appropriately from the fretboard edges.

- draw the fretboard centreline.

- draw in your perpendicular fret (9th in my case)in the appropriate place

- for the first string mark the other frets for the chosen scale length along the marked string length

- repeat for the sixth string

- join the lines from first to sixth string at nut and each fret

- design appropriate end of fretboard at soundhole

- work out a body shape and bracing that fits with appropriate intonation for bridge/saddle design etc(probably part of the first step really )

Iterate around this until you are satisfied and as they say Bob's your Uncle

I cut the slots by hand - not too hard to do.

Mattia & Chris,

My camera batteries have died so no pics now, but there are basically two ways you can do the headstock geometry - the way that everyone else seems to do it and the way that I did it . There was a post here on this recently. As Jammy describes (and Tony Karol did too) you do a scarfe joint, mark where the fretboard end will be on the main neck shaft and sand the headstock to this line so that it "twists" and slopes down to the treble side in relation to the fretboard plane. This leaves the edge of the headstock at the same height at the nut edge. I, however, used a technique that Anthony Z posted for getting the fingerboard side purfling to join up with a slot-head bound side purfling. Make a scarfe joint as normal and then mark the edge of the line of the nut on the fretboard face of the neck. Glue a small piece of scrap wood along this edge that has a face perpendicular to the neck and goes back overhanging the headstock slope. Now sand on the existing headstock plane until the scrap piece of wood is level with the neck at the treble end of the nut. This gives you an untwisted headstock plane but it will be slightly higher at bass end of the nut edge. It's all down to aesthetics really - both work.

Micheal,

Thanks. After the accidental "Tweeter" happening I was tempted to open up a few more a bit like Al C's Corker The others are just EIR inlays.

Waddy,

Thanks. Rosewood is a lot harder to record than mahogany or Limba. The sound is very full with a lot of reverb and overtones.

Hesh,

Everything is crooked mon I'm glad you like the shape. There is a lot of tribute to the great Stefan Sobell's guitars in it.

Bruce,

Thanks

Billy,

I put Z-poxy on the neck rubbed on with paper towels and when cured rub it back with 0000 wire wool. Then I mask it off and spray pre-cat lacquer on the headstock veneers and heel cap. Then I apply a few very thin coats of Tru-oil on the rest of the neck. It makes a really tactile neck to play.


Author:  Dave White [ Wed Oct 24, 2007 6:45 am ]
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Todd and Lance,

Thanks. Thinking keeps your brain in good working order

Author:  RobE [ Wed Oct 24, 2007 6:46 am ]
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That is one fantastic instrument that looks and sounds amazing! Great job!

Author:  WaddyThomson [ Wed Oct 24, 2007 7:11 am ]
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Hey, Dave, I was doing great on understanding the fan fret explanation, until I found out that if I iterate, that Bob's my Uncle.  That would be Bob who?  Note to self: Find out what iteration is, and quit doin' it.   

Author:  erikbojerik [ Wed Oct 24, 2007 8:16 am ]
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[QUOTE=verhoevenc]Ya know what would REALLY be awesome... a tutorial on fanned fret necks... or at least the fretboards.
Chris[/QUOTE]



CAD...a big printer, scissors & double-stick tape...StewMac fret
slot blade...and radial arm saw.  Takes about an hour, or 50
minutes longer than my typical slotting job.  This is a photo of a practice run on MDF.






Author:  TonyKarol [ Wed Oct 24, 2007 8:40 am ]
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I used to mark out the scales by hand, then a fellow named Rollo Scheurenbrand put me onto this website - never looked back as far as printing out scale correct patterns ... you select the scales, the nut and saddle width, the offset from the edge of the fretboard, the straight fret - it takes about 5 minutes and its perfectly laid out.

http://www.fretfind.ekips.org/2d/index.php

I print them out in reverse, ie, left handed, then glue them to the back of a tapered fretboard, then use a clamping jig to hold them while slotting on the tablesaw with Shanes blade

Author:  Colin S [ Wed Oct 24, 2007 8:44 am ]
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Dave, what can I say you truly are an inspiration! It's never predictable what your going to come up with next. Your guitars are identifiable from a mile away as being yours, you have an inimitable style. You play reasonably well too . Got to love Martin Simpson.

When you've got into it a little more let me know what you think of the fan fret for altered tunings. I've only played fan-frets on an old orpherion, and not for long so I'd like your input please.

Colin

Author:  Dave White [ Wed Oct 24, 2007 8:56 am ]
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[QUOTE=WaddyT] Hey, Dave, I was doing great on understanding the fan fret explanation, until I found out that if I iterate, that Bob's my Uncle.  That would be Bob who?  Note to self: Find out what iteration is, and quit doin' it.   
[/QUOTE]

Waddy,

I thought that Dick Van Dyke had taught all Americans how to speak proper Cockney You're lucky I left out "... and Fanny's your Aunt".

Iteration is just going round in circles ... hopefully not like the the Oozalum bird

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